The prompt and non-prompt production cross-sections for psi(2S) mesons are measured using 2.1 fb(-1) of pp collision data at a centre-of-mass energy of 7TeV recorded by the ATLAS experiment at the LHC. The measurement exploits the psi(2S) --> J/psi(--> mu(+)mu(-)) pi(+)pi(-) decay mode, and probes psi(2S) mesons with transverse momenta in the range 10 <= p(T) < 100 GeV and rapidity |y| < 2.0. The results are compared to other measurements of psi(2S) production at the LHC and to various theoretical models for prompt and non-prompt quarkonium production.

Aad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., Aben, R., et al. (2014). Measurement of the production cross-section of ψ(2S) → J/ψ(→μ+μ-)π+π- in pp collisions at √s = 7 TeV at ATLAS. JOURNAL OF HIGH ENERGY PHYSICS, 09(9), 1-48 [10.1007/JHEP09(2014)079].

Measurement of the production cross-section of ψ(2S) → J/ψ(→μ+μ-)π+π- in pp collisions at √s = 7 TeV at ATLAS

V. Bortolotto;F. Ceradini;B. Di Micco;R. Di Nardo;D. Orestano;F. Petrucci;G. Salamanna;